Automatic damper



(No ModeL) 7 G; A.-LEAV IT T, Jr.

AUTOMATIC DAMPER;

Patented Dec. 5. 1882.

INVBNTQR ATTORNEY-S.

N. PETERS. FhMoJ-Rhvgrapher, Wanhingiom D C.

UNITED STATES PATENT OFFICE.

GEORGE A. LEAVITT, J R., OF NEVVBURG, NEW'YORK.

AUTOMATIC DAMPER.

SPECIFICATION formingpart of Letters Patent N 0. 268,696, dated December 5, 1882,

Application filed April 24, 1882. (No model.)

description.

Relerence is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all thefigures.

Figure 1 represents a front end view of an aircurrent deflecting or directing device constructed in accordance .with my invention. Fig. 2 is a horizontal section ofthe same on the line w w in Fig. 1, and showing the device applied to the cold-air box of a furnace or duct t connected therewith; and Fig. 3 is a transverse vertical section of the same on the line g y, in Fig. 2, looking toward the front end of the ventilating device.

My invention relates to improvements in automatic dampers; and it consistsin the peculiar construction and arrangement of parts, as hereinafter fully set forth. I

A indicates an oblong case or frame. open at its opposite endsand sides, but closed atits top a and bottom b. g

B indicates the cold-air box of a furnace or flue leading thereto.

Hinged to the forward ends of the frame A, as at c c, are longswinging valves I) D, opening inward, and forming when closedcovers or doors on the opposite open sides of the frame A. These valves, which are designed to be operated by the wind, should be as light as is consistent with requisite strength the lighter the better-and are each provided on their inner faces with a guard or arm, d, havingon its outer end a roller, 6, which is preferably made of rubber, to cushion the blow caused by con tact of one door with the other and muffle the sound, either door or valve, as it is opened inwardly, serving toclose the other door or valve by means of the guards d or attached rollers 6. Rubber or other soft cushions ff are also provided on opposite sides of the back end of the frame A, for either door to slam against,

then a directcourse will be established for the current through said frame or box, and both valves or doors 1) D will be closed. against their respective sides; but whenever the wind blows from other points of the compass, which will cause it to bear either squarely or obliquely against either door or valve .1), such door will be opened inward and the opposite door or valve, if open, will be closed by the opening one, thus deflecting the current and directing it, by the oblique position which the open door or valve assumes, into the cold-air box or flue. In this way a supply ot'pure or fresh air may be maintained and outward suction of the hot air by crossing or contrary currents may be prevented.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent- 1. The combination, with the box A, leading into the cold-air box B, and having open sides and ends and closed top and bottom, of the swinging valves D D, opening inward, and pivoted to the frame at c, and provided with the arms A, whereby currents of air entering the outer end of the box will close both valves and pass directly into the cold-air box, substantially as described.

2. The combination, with the box A, leading into the cold-air box B, and having open sides and ends and closed top and bottom, of the swinging valves D D, opening inward, and provided with the arms d (1, having rollers c e on their ends, and the cushions ff, substantially as and for the purpose set forth.

GEORGE A. LEAVITT, JR.

. Witnesses:

E. S. TURNER, HENRY B. KNIGHT. 

